Survival Gear for Outdoor Water Needs - If you want to obtain clean drinking water simply and quickly, you can use this survival gear. The mini and lightweight filtering system are ideal for recreation, hiking, camping. It’s also your good companion for scouting, domestic and international travel, emergency preparedness. | Portable & Long Life-Span - This straw filtration at only 6.7" long and 1" in diameter fits any bottle, cup, or glass. It weighs just 2 ounces and fits in the palm of your hand, pocket, gym bag, backpacks, survival packs and purses. Long lifespan ensures it provides up to 1500 liters (396 gallons) of drinking water. You can take it anywhere you want conveniently. | 4-Stage Filtration - Our 4-Stage Filtration system including coarse filter screen, pp cotton, coconut shell activated carbon and hollow fiber ultrafiltration membranes. which can reduce 99.99999% of escherichia coli (Test result from SGS-CSTC Standards Technical Services Co., Ltd.Ningbo Branch, Test Report NBF21-004693-01, Date: 02 Jun 2021). | Smaller Pore Size - We all know that the smaller pore size, the higher the filtering accuracy, Our pore size is 0.1 microns which can reduce 99.99999% of E. Coli. Compared to the 0.2-micron filter straw on the market, Membrane Solutions 0.1microns pore size filter straw maintains the optimum flow rate while maintaining the filtration accuracy. | High-Quality Materials - Compared to the big filter straw on the market, Membrane Solutions water filters have a smaller frame, more convenient to use.